Timer



FIG. 1 is a top perspective view of a timer according to our design;

FIG. 2 is a top view of our design;

FIG. 3 is a front view of our design;

FIG. 4 is a right side elevation of our design; and,

FIG. 5 is the back view of our design.

The broken lines shown in FIGS. 3, 4 and 5 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a timer, as shown and described. 